12. Foods? hikari micro pellets
How often are they fed? 2 times a day morning and evening

13. a. Any abnormal signs/symptoms? loss of appetite, usually transparent but now a cloudy white (inside the fish, not outside). lesion/lump on the first one to die, shown in image. color remains generally normal
b. Appearance of poop? normal
c. Appearance of gills? normal

14. a. Have you treated your fish ahead of diagnosis? no
b. What meds were used? none

15. Insert photos of fish in question and full tank shot if necessary.

sounds like some sort of poisoning. ghost shrimp usually are transparent and will turn opague once there is copper or other heavy metals present in the water ( that's means they are being slowly poisoned by the water )
looks like your fish are going through the same problem. try doing a very large wc and see if they will turn transparent again.

ok i will check. i did a large water change just this past weekend. i just fnisihed treating for ich (they were in the tank at the time), and i did that to remove some of the copper in the tank. they were ok during the full treatment (heat + coppersafe) so thats why i hesitate to think that they are poisoned since they endured that already. is the lesion any help for diagnosing? that was the first thing i noticed. ill do a water change as soon as i can in the meantime

that could be a secondary infection.he must have got scraped or hurt and then the bacteria must have worsened it.try running a good carbon in the filter it will remove most of the toxins including the residue ich meds